Selling for as little as $2.50 when Steam has it on sale, it could be the best game for less than the cost of a fast food meal you can buy.
It’s a multi-body simulator that lets you play with solar systems and galaxies, shoot a black hole by Earth, explode Jupiter, and much more. Even if you don’t create worlds for fiction or game worlds, The Universe Sandbox is a complete blast but if you do it’s an indispensable tool.